Amino USA vs Transition Biotech
Two top US peptide sources scored on the identical published formula: lab credibility, shipping, pricing, operating history, and transparency.
- Amino USA
- 7.78/10
Amino USA
- Transition Biotech
- 7.98/10
Transition Biotech
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Factor by factor
- 8.0Lab Credibilityweight 55%9.2
- 8.0Shipping & Refundweight 20%6.0
- 8.3Pricingweight 15%9.5
- 4.2Operating Historyweight 5%1.8
- 6.5Transparencyweight 5%4.0
- 19Certificates confirmed at the lab10
- 2Labs named on certificates1
Show as a table
| Category | Amino USA | Transition Biotech |
|---|---|---|
| Lab Credibility | 8.0 | 9.2 |
| Shipping & Refund | 8.0 | 6.0 |
| Pricing | 8.3 | 9.5 |
| Operating History | 4.2 | 1.8 |
| Transparency | 6.5 | 4.0 |
| Overall | 7.78 | 7.98 |
Products both carry, price for price
How they compare: the verdict
Transition Biotech takes this matchup by a razor-thin margin, 7.98 to 7.78 on the published formula. Its biggest edge is lab credibility, where it scores 9.2 against Amino USA's 8.0.
It isn't a clean sweep. Amino USA actually edges ahead on transparency (6.5 vs 4.0), so if that factor matters most to you it's worth weighing.
On lab evidence, the heaviest-weighted factor, both Amino USA and Transition Biotech have independently verified third-party COAs, so the gap comes down to the other categories.
Across the 5 peptides both carry, Transition Biotech is cheaper per unit more often (Amino USA wins on 0, Transition Biotech on 5). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Amino USA vs Transition Biotech: FAQ
Amino USA or Transition Biotech: which is better?
Transition Biotech takes this matchup by a razor-thin margin, 7.98 to 7.78 on the published formula. Its biggest edge is lab credibility, where it scores 9.2 against Amino USA's 8.0. It isn't a clean sweep. Amino USA actually edges ahead on transparency (6.5 vs 4.0), so if that factor matters most to you it's worth weighing. On lab evidence, the heaviest-weighted factor, both Amino USA and Transition Biotech have independently verified third-party COAs, so the gap comes down to the other categories. Across the 5 peptides both carry, Transition Biotech is cheaper per unit more often (Amino USA wins on 0, Transition Biotech on 5). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Do Amino USA and Transition Biotech both use third-party testing?
Amino USA: independently verified third-party COAs. Transition Biotech: independently verified third-party COAs.
How was this comparison scored?
Both vendors are scored on the identical published formula: lab credibility 55%, shipping 20%, pricing 15%, operating history 5%, transparency 5%. When third-party testing cannot be independently verified, a testing gate holds the score under a cap that starts at 6.0 and rises by at most 2.5 points for operating history, shipping and reviews. Neither vendor can pay to change a score.
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